228131221477 has 8 divisors (see below), whose sum is σ = 228419397056. Its totient is φ = 227843230752.

The previous prime is 228131221469. The next prime is 228131221481. The reversal of 228131221477 is 774122131822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228131221477 - 2³ = 228131221469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228131225477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2512138 + ... + 2601364.

It is an arithmetic number, because the mean of its divisors is an integer number (28552424632).

Almost surely, 2^228131221477 is an apocalyptic number.

It is an amenable number.

228131221477 is a deficient number, since it is larger than the sum of its proper divisors (288175579).

228131221477 is a wasteful number, since it uses less digits than its factorization.

228131221477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92427.

The product of its digits is 75264, while the sum is 40.

The spelling of 228131221477 in words is "two hundred twenty-eight billion, one hundred thirty-one million, two hundred twenty-one thousand, four hundred seventy-seven".